Mozilla has released a list of 50 Firefox add-ons which slow down the Firefox browser and increase it's start-up time. Not only this, some heavy or buggy add-ons can even slow down Firefox to a level which makes it very difficult to use the brpwser even for regular web browsing.

For best performance of the browser you should disable add-ons which you do not use regularly. Here is the list of the 50 Firefox browser add-ons which are the cause of some of the biggest bottlenecks for the browser. The add-ons have been listed in descending order of the degree by which they slow down Firefox.

FoxLingo

Firebug

AniWeather

FlashGot

FoxClocks

FoxyTunes

Video DownloadHelper

FastestFox

Xmarks Sync

SimilarWeb

CoolPreviews

Adblock Plus

RSS Ticker

StumbleUpon

iMacros for Firefox

Yoono

Personas Plus

Flagfox

All-in-One Sidebar

NoScript

DownThemAll!

Feedly

Greasemonkey

SkipScreen

Download YouTube Videos +

Download Statusbar

Web Developer

ColorZilla

Web of Trust

ReloadEvery

AutoPager

Fire.fm

Google Shortcuts

Flash Video Downloader (Youtube Downloader)

VideoSurf Videos at a Glance

Integrated Gmail

ReminderFox

ScrapBook

Ant Video Downloader and Player

WebMail Notifier

FireGestures

Stylish

Read It Later

Facebook Toolbar

Torbutton

FoxyProxy Standard

ImTranslator

Download Manager Tweak

BetterPrivacy

Firefox Sync

Are you using any of the add-ons listed above? Then let us know about them in the comments section and also try to get rid of those addons from your browser.